Why did Dominic Cooper and Joanna Carolan break up?

Other Relationship Information about Dominic Cooper and Joanna Carolan:

Classic Quotes by Dominic Cooper and Joanna Carolan about their relationship:

"I'd love to know someone who's been in a relationship for that long and still has passion." Dominic Cooper 1/2008

"[We were just] on a break [when he left to film "Mamma Mia"]." Joanna Carolan 1/2009

"I honestly thought [the relationship between him and Amanda] would be a five-minute fling." Joanna Carolan 1/2009

"It was desperately awkward [at the 'Mamma Mia' premiere]. They weren't supposed to be seeing each other by then. But I knew that they were." Joanna Carolan 1/2009

"I said I wanted to marry him and have kids, and he said that's what he wanted too. I took it for granted that he'd end it with Amanda. I realized he was never going to stop seeing her but didn't want to end it with me. I had to kick him out. I can't think of taking him back. I can't be with a man who'd let me go through this...He wanted the best of both worlds." Joanna Carolan 1/2009